Sets the icon of the tooltip (which is in front of the text) to be the stock item indicated by @stock_id with the size indicated by @size. If @stock_id is %NULL, the image will be hidden.
a stock id, or %NULL
a stock icon size (#GtkIconSize)
Deprecated: Use gtk_tooltip_set_icon_from_icon_name() instead.
2.12
See Implementation
Sets the icon of the tooltip (which is in front of the text) to be the stock item indicated by @stock_id with the size indicated by @size. If @stock_id is %NULL, the image will be hidden.